Malicious PDF — malware analysis report

Static analysis result for SHA-256 5097d3987edaff16…

MALICIOUS

PDF

88.3 KB Created: 2021-05-23 01:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3e8aab28443611a7c6332ec0c4a5fdef SHA-1: b76e34cb801d66de7dc1a78c7325987ab2b8f39c SHA-256: 5097d3987edaff1613ecc38ae445aa01e7728c20b03843dd774b22bdfa5d0c41
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/strik?utm_term=how+to+solve+rubik%2527s+cube+easiest+method PDF link annotation
    • https://foworagajiwodim.weebly.com/uploads/1/3/0/9/130969946/dabonetululu.pdfIn PDF document text
    • https://vejikawotepux.weebly.com/uploads/1/3/4/8/134887167/gukig.pdfIn PDF document text
    • https://lonunirixug.weebly.com/uploads/1/3/2/7/132710494/315038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376379/normal_60567f8113e7b.pdfIn PDF document text
    • https://pejoguroboxifuj.weebly.com/uploads/1/3/1/6/131637830/taxemexanibijir-zirasulomofo-vaxaj-lazewukedawe.pdfIn PDF document text
    • https://visuriteja.weebly.com/uploads/1/3/5/3/135323353/zafozovuxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466154/normal_602df642c7358.pdfIn PDF document text
    • https://ruxunomitebapat.weebly.com/uploads/1/3/1/6/131606858/nawezibadodafij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465688/normal_606ea72931575.pdfIn PDF document text
    • https://ledapenilodaro.weebly.com/uploads/1/3/1/0/131070651/xaxebi.pdfIn PDF document text
    • https://vinaxana.weebly.com/uploads/1/3/4/7/134725794/0a9ac4a3b77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486969/normal_604d074fb3054.pdfIn PDF document text
    • https://fojakodi.weebly.com/uploads/1/3/1/3/131379163/fajurezetaladebu.pdfIn PDF document text
    • https://sorurilinoko.weebly.com/uploads/1/3/5/3/135397097/lanawakoverifenip.pdfIn PDF document text
    • https://gedenotovet.weebly.com/uploads/1/3/1/3/131379555/minegolaxesewit.pdfIn PDF document text
    • https://zajanitemamivow.weebly.com/uploads/1/3/2/3/132303208/fusitinatug_desusoferoba_jofowesalim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366993/normal_5fce9d82c59ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/532fe801-3707-4d6a-b19b-3d31ab178cb0/dokuvesopazakatebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f4da330-afa3-4855-b998-b7f180897e98/91417953605.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B48 5528 bytes
SHA-256: 9b57cd9b4af056d41a4fbeba104ef27216b031fc3df924ab7fd3417fcfeae9e1
font_01_sfnt_off00012e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E04 10648 bytes
SHA-256: 320af709581a5222e3dc22b28cd381300433af183ce1dea1072cad2f43a5c748

Open this report in the interactive analyzer, or submit your own file for analysis.